A fish fry screening device for aquaculture

Abstract

The present application belongs to the technical field of aquaculture, and particularly relates to a fish fry screening device for aquaculture, which comprises a fish releasing platform, a fish screening platform is arranged on one side of the fish releasing platform, a fish releasing rack assembly is arranged on one end of the top outer wall of the fish releasing platform, and the fish releasing rack assembly comprises a fish releasing pool, a fish releasing pool and a fish outlet plate, wherein the fish releasing pool is fixedly connected to the top outer wall of the fish releasing platform through screws, the fish releasing pool is welded to the outer wall on one side of the fish releasing pool, and the fish outlet plate is welded to the bottom of the outer wall on one end of the fish releasing pool; a fish releasing mechanism is arranged on the inner wall of the fish releasing pool; and symmetrically distributed fish distributing frame assemblies are welded to the top inner wall of the fish screening platform. The fish fry conveying, dispersing, reciprocating fish driving and multi-stage screening are realized through the mechanical linkage and cooperative operation of the fish releasing mechanism, the circulating fish screening auxiliary mechanism and the fish distributing frame assemblies, which helps to solve the problems of fish fry damage caused by accumulation, screen clogging and uneven grading, and improves the screening efficiency and survival rate.

Description

Technical Field

[0001] This invention relates to the field of aquaculture technology, and in particular to a fish fry screening device for aquaculture. Background Technology

[0002] Fish fry sorting devices are key specialized equipment in aquaculture seedling production for grading by size and separating fish fry into different ponds. They are primarily used for the automated grading and sorting of newly hatched fish fry according to body length and shape, separating fry of different sizes into different grades for separate rearing. This significantly improves the uniformity of fry growth, survival rate, and feed utilization, making it an indispensable core piece of equipment for large-scale aquaculture seedling bases. Most existing sorting equipment uses inclined trough screening, drum screening, or vibrating screening structures, relying on the fry's own gravity and the screen mesh size to achieve grading. These devices are simple in structure, widely used, and suitable for grading most common fish fry.

[0003] Traditional fish fry screening devices have significant shortcomings in practical use and cannot meet the demands of modern fry breeding for high survival rates and high uniformity: First, the fish fry conveying, discharging, and dispersing cannot be coordinated and synchronized, causing the fish fry to easily pile up, squeeze, and collide, resulting in mechanical damage and a decrease in survival rate. In addition, the fish fry passively slide down during the screening process, lacking active auxiliary material distribution, causing the fish fry to easily stagnate, clump together, and clog the screen, resulting in incomplete grading, low screening accuracy, and low efficiency. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention provides a fish fry screening device for aquaculture, which overcomes the shortcomings of the prior art and effectively solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A fish fry screening device for aquaculture includes a fish release platform, a fish screening platform on one side of the fish release platform, and a fish release frame assembly at one end of the top outer wall of the fish release platform. The fish release frame assembly includes a fish release pool, a fish feeding pool, and a fish discharge plate. The fish release pool is fixedly connected to the top outer wall of the fish release platform by screws. The fish feeding pool is welded to one side outer wall of the fish release pool. The fish discharge plate is welded to the bottom of one end outer wall of the fish release pool. A fish release mechanism is provided on the inner wall of the fish release pool. Symmetrically distributed fish dividing frame assemblies are welded to the top inner wall of the fish screening platform. Each of the two fish dividing frame assemblies has a fish dropping inclined plate welded to its top outer wall. A rectangular frame is welded between the two fish dropping inclined plates. An arc-shaped buffer pad is fixedly connected to the top outer wall of the rectangular frame. A circulating fish screening auxiliary mechanism is provided inside the rectangular frame.

[0006] The above scheme uses a fish-feeding pond for pouring in fish fry, a fish-releasing pond for temporary storage and flow guidance, and a fish-discharging board with a gentle slope to guide the fish fry into a dispersed area. The fish fry enter the fish-releasing pond from the fish-feeding pond and slide out through the fish-discharging board to achieve stable flow and avoid falling and damage.

[0007] Preferably, the fish-releasing mechanism includes a fish-feeding abrasive roller, a horizontal column, a first bevel gear, a second bevel gear, a vertical column, a first servo motor, a conical dispersing disc, and a pulley pair. The fish-feeding abrasive roller is rotatably connected to the inner wall of one end of the fish-releasing pool. The horizontal column is fixedly connected to the outer wall of one end of the fish-feeding abrasive roller. The first bevel gear is fixedly connected to the outer wall of one end of the horizontal column. The second bevel gear meshes with the outer wall of the first bevel gear. The vertical column is fixedly connected to the bottom outer wall of the second bevel gear and rotatably connected to the top outer wall of the fish-releasing platform via a bearing. The first servo motor is located at the top of the fish-releasing platform. The conical dispersing disc is fixedly connected to the output shaft of the first servo motor via a coupling. The pulley pair is installed between the conical dispersing disc and the vertical column. The conical dispersing disc is located at the bottom of one end of the fish-discharging plate and is embedded in the inner wall of the fish-releasing platform.

[0008] With the above scheme, the first servo motor serves as the sole power source. The output shaft of the first servo motor drives the conical dispersing disc to rotate. The conical dispersing disc transmits torque to the vertical column through a pulley pair. The vertical column drives the second bevel gear to rotate. The second bevel gear meshes with and drives the first bevel gear to turn, causing the horizontal column and the fish-feeding sanding roller to rotate synchronously at low speed. The surface of the fish-feeding sanding roller adopts a flexible sanding structure, which gently pushes the fish fry out at a uniform speed without pinching or injuring them. After falling from the fish-discharging plate, the fish fry land directly on the inclined surface of the conical dispersing disc and disperse evenly outward under the action of centrifugal force, realizing the working mode of "conveying-discharging-dispersing". The structure is closely linked, the actions are synchronized, and the operation is stable, avoiding the accumulation of fish fry from the source.

[0009] Preferably, the fish sorting frame assembly includes a primary fish sorting frame, a secondary fish sorting frame, a tertiary fish sorting frame, and a quaternary fish sorting frame, wherein the primary, secondary, tertiary, and quaternary fish sorting frames are installed sequentially from left to right on the inner wall of the fish screening platform, and the top outer wall of the primary, secondary, tertiary, and quaternary fish sorting frames is provided with a screen, and the screen mesh size of the primary, secondary, tertiary, and quaternary fish sorting frames increases sequentially.

[0010] Through the above scheme, small fish fry are first screened out from the primary sorting frame, medium-sized fish fry are screened out from the secondary and tertiary sorting frames in sequence, and large fish fry are finally screened out from the quaternary sorting frame, achieving continuous, automatic, and precise four-level grading with clear grading and no confusion between gradings.

[0011] Preferably, the circulating fish-screening auxiliary mechanism includes a second servo motor, a rotating bar, a sliding block, a rectangular plate, a rack, a spur gear, a traction swing plate, a reciprocating column, and a fish-driving plate. The second servo motor is located at the bottom of the rectangular frame. The rotating bar is fixedly connected to the output shaft of the second servo motor via a coupling. The sliding block is rotatably connected to the outer wall of one end of the rotating bar. The rectangular plate extends through the outer wall of the sliding block. The rack is welded to the top outer wall of the rectangular plate. The spur gear meshes with the outer wall of the rack. The traction swing plate is fixedly connected to the center of the top outer wall of the spur gear. Two reciprocating columns extend through the inner walls of both ends of the traction swing plate. The fish-driving plate is welded to the top outer wall of the reciprocating column.

[0012] Through the above scheme, the second servo motor drives the rotating bar to make circular motion, and the rotating bar drives the sliding block to push and pull the rectangular plate and the rack to make horizontal reciprocating linear motion. The rack meshes with the flat gear to rotate alternately in the forward and reverse directions. The flat gear drives the traction swing plate to make fixed-axis reciprocating swing. The two ends of the traction swing plate pull the fish-driving plates on both sides through the reciprocating movable columns, and move synchronously and smoothly back and forth along the guide rod and the chute. The fish-driving plates are close to the surface of the fish-dropping inclined plate, and push the fish fry evenly with slow and gentle movements to prevent the fish fry from staying in the same position and causing blockage. This allows the fish fry to pass through each level of screen at a uniform speed, in an orderly and dispersed manner, which significantly improves the smoothness and uniformity of screening.

[0013] Preferably, support legs are welded to the four corners of the bottom outer wall of the fish screening platform, and L-shaped mounting plates are welded to the outer walls of the support legs. The second servo motor is fixedly connected to the inner wall of one side of the L-shaped mounting plate by screws. The traction swing plate is rotatably connected to the top outer wall of the L-shaped mounting plate, and the rack is slidably connected to the top inner wall of the L-shaped mounting plate.

[0014] Through the above solution, the L-shaped mounting plate provides overall rigid support for the circulating fish screening auxiliary mechanism, ensuring that the second servo motor, rack, and traction swing plate maintain precise relative positions, guaranteeing that the reciprocating motion does not deviate, jam, or make abnormal noise, and improving the service life and stability of the mechanism.

[0015] Preferably, guide rods are fixedly connected to the inner walls on both sides of the rectangular frame, and the guide rods are inserted through the inner wall of one end of the fish-driving plate.

[0016] The above scheme guides the fish-repelling plate horizontally and linearly, restricting the fish-repelling plate to move only along the axial direction. This ensures that the fish-repelling plates on both sides move synchronously, with uniform force, and fit the fish-dropping inclined plate, thereby improving the uniformity of the fish-repelling fabric.

[0017] Preferably, an annular protective plate is fixedly connected to the top outer wall of the fish release platform, and the annular protective plate is arranged around the outer wall of the conical dispersion plate, and a fish release notch is opened at the end of the annular protective plate near the fish sieve platform.

[0018] The above solution uses a ring-shaped guard plate to surround the conical dispersion disc, preventing fish fry from splashing out or falling during centrifugal dispersion. This ensures that all fish fry can slide out smoothly from the designated opening, improving feeding accuracy and equipment cleanliness.

[0019] Preferably, a motor support base is welded to the top outer wall of the fish release platform, and the first servo motor is fixedly connected to the top outer wall of the motor support base by screws.

[0020] The above solution raises the mounting position of the first servo motor by raising the motor support base, so that the motor output shaft and the conical dispersion disk are coaxial, reducing radial runout, reducing transmission noise, and improving operational stability and service life.

[0021] Preferably, the fish-driving plate is closely attached to the inner wall of the fish-dropping inclined plate, and the two fish-driving plates are centrally symmetrically distributed with the center of the flat gear as the axis. The outer walls on both sides of the rectangular frame are provided with sliding grooves, and the fish-driving plates and the sliding grooves are in sliding fit.

[0022] The above scheme ensures that the symmetrical structure causes the fish-dropping inclined plates on both sides to be subjected to equal forces, improving the balance of fish fry distribution. The chute provides movement limits for the fish-driving plate, ensuring precise stroke and gentle movement, further improving the uniformity of screening and the screening effect.

[0023] The beneficial effects of this invention are as follows: The fish fry screening device for aquaculture of the present invention achieves integrated continuous operation of fish fry transportation, dispersion, reciprocating fish driving and multi-stage screening through the mechanical linkage and coordinated operation of the fish release mechanism, the circulating fish screening auxiliary mechanism and the fish separation frame assembly. It helps to solve the problems of fish fry accumulation damage, screen blockage and uneven grading, and improves screening efficiency and survival rate. The fish fry screening device for aquaculture of the present invention forms a single-power synchronous transmission system through a first servo motor, a conical dispersing disc, a pulley pair, a bevel gear set, and a fish-feeding grinding roller. The first servo motor drives the dispersing and fish-feeding actions while rotating, and the operation is highly synchronized. The fish-feeding grinding roller can gently discharge the material without pinching the fish, and the conical dispersing disc can evenly distribute the material without accumulation. The entire process is free from impact, compression, and damage. The fish fry screening device for aquaculture of the present invention, through a circulating fish screening auxiliary mechanism composed of a second servo motor, a rotating bar, a rack, a flat gear, a traction swing plate, and a fish driving plate, transforms the rotational motion into a smooth reciprocating push-pull motion, thereby controlling the fish driving plate to move gently and uniformly along the fish dropping inclined plate, actively assisting the fish fry to swim down and prevent them from getting stuck and blocking the net, so that the fish fry are evenly distributed and the screening is smooth. The fish fry screening device for aquaculture of the present invention facilitates the pouring of fish fry into the fish pond, which serves as a temporary storage and flow guide. Furthermore, the fish discharge plate gently guides the fish fry into the dispersion area, preventing them from falling and getting damaged. At the same time, the fish sorting frame assembly with four increasing aperture levels and the fish dropping inclined plate work together to achieve continuous four-level precise screening with clear grading gradients and high screening accuracy. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the overall structure of a fish fry screening device for aquaculture proposed in this invention. Figure 1 ; Figure 2 This is a three-dimensional schematic diagram of the overall structure of a fish fry screening device for aquaculture proposed in this invention. Figure 2 ; Figure 3 This is a schematic diagram of the fish release platform connection structure of a fish fry screening device for aquaculture proposed in this invention; Figure 4 This is a schematic diagram of the fish sieving platform connection structure of a fish fry screening device for aquaculture proposed in this invention. Figure 5 This is a schematic diagram of the rectangular frame connection structure of a fish fry screening device for aquaculture proposed in this invention; Figure 6 This is a partial structural diagram of the circulating fish screening auxiliary mechanism of a fish fry screening device for aquaculture proposed in this invention; Figure 7 For based on Figure 2 An enlarged schematic diagram of part A of the structure.

[0025] In the diagram: 1. Fish releasing platform; 2. Fish screening platform; 3. Fish releasing rack assembly; 31. Fish releasing pond; 32. Fish feeding pond; 33. Fish discharging plate; 4. Fish releasing mechanism; 41. Fish feeding abrasive roller; 42. Horizontal column; 43. First bevel gear; 44. Second bevel gear; 45. Vertical column; 46. First servo motor; 47. Conical dispersing disc; 48. Pulley pair; 5. Fish separating frame assembly; 51. Primary fish separating frame; 52. Secondary fish separating frame; 53. Tertiary fish separating frame. 54. Fish frame; 6. Four-level fish frame; 7. Fish dropping ramp; 8. Rectangular frame; 9. Arc-shaped buffer pad; 10. Circulating fish screening auxiliary mechanism; 11. Second servo motor; 12. Rotating bar; 13. Sliding block; 14. Rectangular plate; 15. Rack; 16. Flat gear; 17. Traction swing plate; 18. Reciprocating moving column; 19. Fish driving plate; 10. L-shaped mounting plate; 11. Guide rod; 12. Annular guard plate; 13. Motor support base; 14. Slide groove. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0027] Reference Figures 1-7 Example 1: A fish fry screening device for aquaculture includes a fish release platform 1, a fish screening platform 2 on one side of the fish release platform 1, a fish release frame assembly 3 at one end of the top outer wall of the fish release platform 1, and a fish release mechanism 4 on the inner wall of the fish release pond 31. The fish release mechanism 4 includes a fish feeding abrasive roller 41, a horizontal column 42, a first bevel gear 43, a second bevel gear 44, a vertical column 45, a first servo motor 46, a conical dispersing disc 47, and a pulley pair 48. The fish feeding abrasive roller 41 is rotatably connected to the inner wall of one end of the fish release pond 31, the horizontal column 42 is fixedly connected to the outer wall of one end of the fish feeding abrasive roller 41, and the first bevel gear 43 is fixedly connected to the inner wall of the fish release pond 31. A second bevel gear 44 is connected to the outer wall of one end of the horizontal column 42, meshes with the outer wall of the first bevel gear 43, a vertical column 45 is fixedly connected to the bottom outer wall of the second bevel gear 44, and the vertical column 45 is rotatably connected to the top outer wall of the fish release platform 1 through a bearing, a first servo motor 46 is set at the top of the fish release platform 1, a conical dispersing disc 47 is fixedly connected to the output shaft of the first servo motor 46 through a coupling, and a pulley pair 48 is installed between the conical dispersing disc 47 and the vertical column 45. The conical dispersing disc 47 is located at the bottom of one end of the fish outlet plate 33, and the conical dispersing disc 47 is embedded in the inner wall of the fish release platform 1.

[0028] With the above scheme, the first servo motor 46 serves as the sole power source. The output shaft of the first servo motor 46 drives the conical dispersing disk 47 to rotate. The conical dispersing disk 47 transmits torque to the vertical column 45 through the pulley pair 48. The vertical column 45 drives the second bevel gear 44 to rotate. The second bevel gear 44 meshes and drives the first bevel gear 43 to turn, causing the horizontal column 42 and the fish feeding grinding roller 41 to rotate synchronously at low speed. The surface of the fish feeding grinding roller 41 adopts a flexible grinding structure, which gently pushes the fish fry to be discharged at a uniform speed without pinching or injuring the fish fry. After the fish fry fall from the fish discharge plate 33, they fall directly onto the inclined surface of the conical dispersing disk 47 and are evenly dispersed outward under the action of centrifugal force, realizing the working mode of "conveying-discharging-dispersing". The structure is closely linked, the action is synchronized, and the operation is stable, avoiding the accumulation of fish fry from the source.

[0029] In this embodiment, a single-power synchronous transmission system is formed by the first servo motor 46, the conical dispersing disc 47, the pulley pair 48, the bevel gear set, and the fish-feeding grinding roller 41. The first servo motor 46 drives the dispersing and fish-feeding actions while rotating, and the operation is highly synchronized. The fish-feeding grinding roller 41 can gently discharge the material without pinching the fish, and the conical dispersing disc 47 can evenly distribute the material without accumulation. There is no impact, no squeezing, and no damage throughout the process.

[0030] In embodiment two, the inner wall of the top of the fish screening platform 2 is welded with symmetrically distributed fish-dividing frame components 5, and the outer wall of the top of each of the two fish-dividing frame components 5 is welded with a fish-dropping inclined plate 6. A rectangular frame 7 is welded between the two fish-dropping inclined plates 6, and an arc-shaped buffer pad 8 is fixedly connected to the outer wall of the top of the rectangular frame 7. A circulating fish screening auxiliary mechanism 9 is set inside the rectangular frame 7. The circulating fish screening auxiliary mechanism 9 includes a second servo motor 91, a rotating bar 92, a sliding block 93, a rectangular plate 94, a rack 95, a flat gear 96, a traction swing plate 97, a reciprocating movable column 98, and a fish-driving plate 99. The second servo motor 91 is configured with... At the bottom of the rectangular frame 7, the rotating bar 92 is fixedly connected to the output shaft of the second servo motor 91 via a coupling. The sliding block 93 is rotatably connected to the outer wall of one end of the rotating bar 92. The rectangular plate 94 is installed through the outer wall of the sliding block 93. The rack 95 is welded to the top outer wall of the rectangular plate 94. The spur gear 96 meshes with the outer wall of the rack 95. The traction swing plate 97 is fixedly connected to the center of the top outer wall of the spur gear 96. Two reciprocating movable columns 98 are respectively installed through the inner walls of both ends of the traction swing plate 97. The fish-driving plate 99 is welded to the top outer wall of the reciprocating movable column 98.

[0031] Through the above scheme, the second servo motor 91 drives the rotating bar 92 to perform circular motion. The rotating bar 92 drives the sliding block 93 to push and pull the rectangular plate 94 and the rack 95 to perform horizontal reciprocating linear motion. The rack 95 meshes with the flat gear 96 to perform alternating forward and reverse rotation. The flat gear 96 drives the traction swing plate 97 to perform fixed-axis reciprocating swing. The two ends of the traction swing plate 97 pull the fish-driving plates 99 on both sides through the reciprocating movable columns 98, and move synchronously and smoothly back and forth along the guide rod 11 and the slide groove 14. The fish-driving plates 99 are close to the surface of the fish-dropping inclined plate 6, and push the fish fry to be evenly distributed with slow and gentle movements, preventing the fish fry from staying in the same position and causing blockage. This allows the fish fry to pass through each level of screen at a uniform speed, in an orderly and dispersed manner, which significantly improves the smoothness and uniformity of screening.

[0032] In this embodiment, the circulating fish screening auxiliary mechanism 9, composed of the second servo motor 91, rotating bar 92, rack 95, flat gear 96, traction swing plate 97, and fish driving plate 99, transforms the rotational motion into a smooth reciprocating push-pull motion, thereby controlling the fish driving plate 99 to move gently and evenly along the fish dropping inclined plate 6, actively assisting the fish fry to swim down and prevent them from getting stuck and blocking the net, so that the fish fry are evenly distributed and the screening is smooth.

[0033] In embodiment three, the fish-releasing rack assembly 3 includes a fish-releasing pool 31, a fish-feeding pool 32, and a fish-discharging plate 33. The fish-releasing pool 31 is fixedly connected to the top outer wall of the fish-releasing platform 1 by screws. The fish-feeding pool 32 is welded to one side outer wall of the fish-releasing pool 31. The fish-discharging plate 33 is welded to the bottom of one end outer wall of the fish-releasing pool 31. The fish-dividing frame assembly 5 includes a primary fish-dividing frame 51, a secondary fish-dividing frame 52, a tertiary fish-dividing frame 53, and a quaternary fish-dividing frame 54. The primary fish sorting frame 51, the secondary fish sorting frame 52, the tertiary fish sorting frame 53, and the quaternary fish sorting frame 54 are installed sequentially from left to right on the inner wall of the fish screening platform 2. The top outer wall of the primary fish sorting frame 51, the secondary fish sorting frame 52, the tertiary fish sorting frame 53, and the quaternary fish sorting frame 54 are all equipped with screens, and the screen mesh size of the primary fish sorting frame 51, the secondary fish sorting frame 52, the tertiary fish sorting frame 53, and the quaternary fish sorting frame 54 increases sequentially.

[0034] Through the above scheme, the fish-feeding pond 32 is used to pour in the fish fry, the fish-releasing pond 31 serves as a temporary storage and diversion function, and the fish-discharging plate 33 guides the fish fry into the dispersion area with a gentle slope to avoid falling and damage. The first-level fish-sorting frame 51 to the fourth-level fish-sorting frame 54 are arranged in sequence, with the screen mesh size increasing at each level. As the fish fry slide down the fish-dropping inclined plate 6, small fish fry are screened out first from the first-level fish-sorting frame 51, medium-sized fish fry are screened out from the second-level fish-sorting frame 52 and the third-level fish-sorting frame 53 in sequence, and large fish fry are finally screened out from the fourth-level fish-sorting frame 54, realizing continuous, automatic, and precise four-level grading with clear grading and no confusion between them.

[0035] In this embodiment, the fish-feeding pool 32 facilitates the pouring of fish fry, the fish-releasing pool 31 serves as a temporary storage and diversion function, and the fish-discharging plate 33 can gently guide the fish fry into the dispersion area to avoid falling and damage. At the same time, the fish-separating frame component 5 with four increasing apertures and the fish-dropping inclined plate 6 work together to achieve continuous four-level precise screening, with clear grading gradients and high screening accuracy.

[0036] Support legs are welded to the four corners of the bottom outer wall of the fish screening platform 2, and L-shaped mounting plates 10 are welded to the outer walls of the support legs. The second servo motor 91 is fixedly connected to the inner wall of one side of the L-shaped mounting plate 10 by screws. The traction swing plate 97 is rotatably connected to the top outer wall of the L-shaped mounting plate 10, and the rack 95 is slidably connected to the top inner wall of the L-shaped mounting plate 10.

[0037] Through the above scheme, the L-shaped mounting plate 10 provides overall rigid support for the circulating fish screening auxiliary mechanism 9, so that the second servo motor 91, rack 95 and traction swing plate 97 maintain precise relative positions, ensuring that the reciprocating motion does not deviate, jam or make abnormal noise, and improving the service life and stability of the mechanism.

[0038] Guide rods 11 are fixedly connected to the inner walls on both sides of the rectangular frame 7, and the guide rods 11 are installed through the inner wall of one end of the fish-driving plate 99.

[0039] Through the above scheme, the guide rod 11 guides the fish-repelling plate 99 horizontally and linearly, restricting the fish-repelling plate 99 to move only along the axial direction, ensuring that the fish-repelling plates 99 on both sides move synchronously, with uniform force, and fit the fish-dropping inclined plate 6, thereby improving the uniformity of the fish-repelling cloth.

[0040] A ring-shaped protective plate 12 is fixedly connected to the top outer wall of the fish release platform 1, and the ring-shaped protective plate 12 is arranged around the outer wall of the conical dispersion plate 47, and a fish release notch is opened at the end of the ring-shaped protective plate 12 near the fish screen platform 2.

[0041] With the above solution, the annular guard plate 12 surrounds the conical dispersion plate 47 to form a barrier, preventing the fish fry from splashing out or falling during centrifugal dispersion, so that all the fish fry can slide out smoothly from the designated gap, improving the accuracy of feeding and the cleanliness of the equipment.

[0042] A motor support base 13 is welded to the top outer wall of the fish platform 1, and the first servo motor 46 is fixedly connected to the top outer wall of the motor support base 13 by screws.

[0043] Through the above solution, the motor support 13 raises the installation position of the first servo motor 46, so that the motor output shaft and the conical dispersion disk 47 are coaxial, reducing radial runout, reducing transmission noise, and improving operational stability and service life.

[0044] The fish-repelling plate 99 is closely attached to the inner wall of the fish-falling inclined plate 6, and the two fish-repelling plates 99 are centrally symmetrically distributed with the center of the flat gear 96 as the axis. The outer walls on both sides of the rectangular frame 7 are provided with sliding grooves 14, and the fish-repelling plates 99 and the sliding grooves 14 are in sliding fit.

[0045] Through the above scheme, the symmetrical structure ensures that the fish-dropping inclined plates 6 on both sides are subjected to the same force, improving the balance of fish fry distribution. The chute 14 provides a movement limit for the fish-driving plate 99, ensuring precise stroke and gentle movement, further improving the screening uniformity and screening effect.

[0046] Working principle: Fish fry are temporarily stored in the fish release pool 31 from the fish release pool 32 of the fish release frame assembly 3. The first servo motor 46 starts running, and the output shaft drives the conical dispersion disk 47 to rotate. The conical dispersion disk 47 drives the vertical column 45 to rotate through the pulley pair 48. The vertical column 45 drives the second bevel gear 44 to mesh with the first bevel gear 43, driving the horizontal column 42 and the fish conveying sanding roller 41 to rotate gently and synchronously. The fish fry are transported to the fish release plate 33 smoothly, at a constant speed, and without compression. The fish fry slide smoothly down the fish release plate 33 onto the rotating conical dispersion disk 47. Under the action of centrifugal force, they are evenly dispersed outward. Under the blocking and guiding action of the annular guard plate 12, the fish fry slide out smoothly from the designated gap and land on the arc-shaped buffer pad 8 at the top of the rectangular frame 7 for flexible buffering, avoiding collision, jumping, and injury of the fish fry. After being buffered, the fish fry fall evenly onto the fish-falling inclined plates 6 on both sides. At this time, the second servo motor 91 continues to run, driving the rotating bar 92 to make circular motion. Through the sliding block 93, it drives the rectangular plate 94 and the rack 95 to make horizontal reciprocating linear motion. The rack 95 meshes with the flat gear 96 to rotate alternately in the forward and reverse directions, driving the traction swing plate 97 to make fixed-axis reciprocating swing. The traction swing plate 97 pulls the fish-driving plates 99 on both sides through the reciprocating movable column 98, and moves synchronously, gently, and at a uniform speed along the guide rod 11 and the slide 14 on the surface of the fish-falling inclined plate 6. This actively assists the fish fry to disperse and slide down, preventing the fish fry from being stuck, clustered, or clogging the screen. With the assistance of the fish-driving plate 99, the fish fry slide down the fish-dropping inclined plate 6 in an orderly manner, passing through the fish-separating frame assembly 5 in sequence. The mesh size of the screens in the first-level fish-separating frame 51, the second-level fish-separating frame 52, the third-level fish-separating frame 53, and the fourth-level fish-separating frame 54 increases in size. Under their own gravity and with the assistance of the assisted push, the fish fry of different sizes pass through the screens of the corresponding mesh size and fall into the corresponding fish-separating frames, completing a continuous, stable, efficient, and non-damaging multi-level automated grading and screening process.

[0047] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A fish fry screening device for aquaculture, comprising a fish release platform (1), characterized in that, A fish-screening platform (2) is provided on one side of the fish-releasing platform (1). A fish-releasing frame assembly (3) is provided at one end of the top outer wall of the fish-releasing platform (1). The fish-releasing frame assembly (3) includes a fish-releasing pool (31), a fish-feeding pool (32), and a fish-discharging plate (33). The fish-releasing pool (31) is fixedly connected to the top outer wall of the fish-releasing platform (1) by screws. The fish-feeding pool (32) is welded to one side outer wall of the fish-releasing pool (31). The fish-discharging plate (33) is welded to one end of the fish-releasing pool (31). At the bottom of the wall, a fish release mechanism (4) is provided on the inner wall of the fish release pool (31). Symmetrically distributed fish separation frame components (5) are welded to the top inner wall of the fish screening platform (2), and fish dropping inclined plates (6) are welded to the top outer walls of the two fish separation frame components (5). A rectangular frame (7) is welded between the two fish dropping inclined plates (6), and an arc-shaped buffer pad (8) is fixedly connected to the top outer wall of the rectangular frame (7). A circulating fish screening auxiliary mechanism (9) is provided inside the rectangular frame (7).

2. The fish fry screening device for aquaculture according to claim 1, characterized in that, The fish release mechanism (4) includes a fish-feeding abrasive roller (41), a horizontal column (42), a first bevel gear (43), a second bevel gear (44), a vertical column (45), a first servo motor (46), a conical dispersing disc (47), and a pulley pair (48). The fish-feeding abrasive roller (41) is rotatably connected to the inner wall of one end of the fish release pool (31), the horizontal column (42) is fixedly connected to the outer wall of one end of the fish-feeding abrasive roller (41), the first bevel gear (43) is fixedly connected to the outer wall of one end of the horizontal column (42), and the second bevel gear (44) meshes with the outer wall of the first bevel gear (43). The vertical column (45) is fixedly connected to the bottom outer wall of the second bevel gear (44), and the vertical column (45) is rotatably connected to the top outer wall of the fish release platform (1) through a bearing. The first servo motor (46) is set on the top of the fish release platform (1). The conical dispersing disk (47) is fixedly connected to the output shaft of the first servo motor (46) through a coupling. The pulley pair (48) is installed between the conical dispersing disk (47) and the vertical column (45). The conical dispersing disk (47) is located at the bottom of one end of the fish release plate (33), and the conical dispersing disk (47) is embedded in the inner wall of the fish release platform (1).

3. The fish fry screening device for aquaculture according to claim 1, characterized in that, The fish sorting frame assembly (5) includes a primary fish sorting frame (51), a secondary fish sorting frame (52), a tertiary fish sorting frame (53), and a quaternary fish sorting frame (54). The primary fish sorting frame (51), the secondary fish sorting frame (52), the tertiary fish sorting frame (53), and the quaternary fish sorting frame (54) are installed sequentially from left to right on the inner wall of the fish screening platform (2). The top outer wall of the primary fish sorting frame (51), the secondary fish sorting frame (52), the tertiary fish sorting frame (53), and the quaternary fish sorting frame (54) are all equipped with screens, and the screen apertures of the primary fish sorting frame (51), the secondary fish sorting frame (52), the tertiary fish sorting frame (53), and the quaternary fish sorting frame (54) increase sequentially.

4. The fish fry screening device for aquaculture according to claim 1, characterized in that, The circulating fish-screening auxiliary mechanism (9) includes a second servo motor (91), a rotating bar (92), a sliding block (93), a rectangular plate (94), a rack (95), a spur gear (96), a traction swing plate (97), a reciprocating movable column (98), and a fish-driving plate (99). The second servo motor (91) is located at the bottom of the rectangular frame (7). The rotating bar (92) is fixedly connected to the output shaft of the second servo motor (91) via a coupling. The sliding block (93) is rotatably connected to the rotating bar (94). On one end of the outer wall of 92), a rectangular plate (94) is installed through the outer wall of the sliding block (93), a rack (95) is welded to the top outer wall of the rectangular plate (94), a spur gear (96) meshes with the outer wall of the rack (95), a traction swing plate (97) is fixedly connected to the center of the top outer wall of the spur gear (96), two reciprocating movable columns (98) are respectively installed through the inner walls of both ends of the traction swing plate (97), and a fish-driving plate (99) is welded to the top outer wall of the reciprocating movable column (98).

5. The fish fry screening device for aquaculture according to claim 1, characterized in that, The bottom outer wall of the fish screening platform (2) is welded with support legs at the four corners, and an L-shaped mounting plate (10) is welded on the outer wall of the support legs. The second servo motor (91) is fixedly connected to the inner wall of one side of the L-shaped mounting plate (10) by screws. The traction swing plate (97) is rotatably connected to the top outer wall of the L-shaped mounting plate (10), and the rack (95) is slidably connected to the top inner wall of the L-shaped mounting plate (10).

6. The fish fry screening device for aquaculture according to claim 1, characterized in that, Guide rods (11) are fixedly connected to the inner walls on both sides of the rectangular frame (7), and the guide rods (11) are installed through the inner wall of one end of the fish-driving plate (99).

7. The fish fry screening device for aquaculture according to claim 1, characterized in that, The top outer wall of the fish release platform (1) is fixedly connected with an annular guard plate (12), and the annular guard plate (12) is arranged around the outer wall of the conical dispersion plate (47), and a fish release notch is opened at one end of the annular guard plate (12) near the fish screen platform (2).

8. The fish fry screening device for aquaculture according to claim 1, characterized in that, The fish release platform (1) has a motor support base (13) welded to the top outer wall, and the first servo motor (46) is fixedly connected to the top outer wall of the motor support base (13) by screws.

9. A fish fry screening device for aquaculture according to claim 4, characterized in that, The fish-driving plate (99) is closely attached to the inner wall of the fish-falling inclined plate (6), and the two fish-driving plates (99) are centrally symmetrically distributed with the center of the flat gear (96) as the axis. The outer walls on both sides of the rectangular frame (7) are provided with sliding grooves (14), and the fish-driving plate (99) and the sliding grooves (14) slide together.

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